Rock-drill.



PATENTED JULY 1'7, 1906.

J. MATHBRS.

BUCK DRILL.

APPLIUATION FILED SEPT. 2z. 1905.

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f No. .826,108.

- UNITED sri-aras PATENT onirica..

JAMES MA'rHEas, or SAN FaANnsco, cALIronNA.

Rock-mann.;

Be it known that I, JAMnsMATHERs, a citizen of the United States, residing in the city andv county of San Francisco and State of California, have invented new and useful Improvements in Rock-Drills, of which the folowing is a specification.

My invention relates to improvements 1n rock-drills, and particularly to means for supplying water in the bottom of the drill-hole and my invention consists of the parts and the constructions and combinations of parts,

which I will hereinafterdescribe and claim. It also comprises details of construction which Will be more fully explained' by reference to the *accompanying drawings, in

Figure 1 is a longitudinal section of the device. Fig-2 is a transverse section through B B, Fig. 1. Fig. 3 is a transverse section of the drill-shank and tube. A

In the operation of rook-drills it is desirable to supply water in the drill-hole to assist '1n the more rapid operationof drilling. Va-

rious devices have been employed for this pu ose. In my invention I form the drill A Wit a groove or channel upon one side, as at 2. Within this groove or channel is fitted a small tube 3, the channel'being undercut, so that' the tube may be slightly i'latteneclor y com ressed and held rigidly in place.

"T e tube may extend to a point sufficiently near the cutting end of the drill to insure water beingdelivered to the bottom of the hole, and it is suiciently shorter than the lengthof the drill so that it Will-notbe affectedby the heating 'required in sharpening the drills.

V The upper end of the tube enters a socket' 4, which is welded or otherwise secured at the u per end of the drill and near to the point here the drill enters the chuck or clamp 5.

The cylindrical end of the drill fits in-a correspondingly-shaped socket inthe chuck and may be secured by a Wedge-shaped key or bolt 6, which is driven in transversely at one side of the drill end and may be secured by a nut upon the screw-threaded end of vthe wedge-shaped bolt.

'A- stem or shank 7 extends backwardly into the head 8, Within which it is slidable, and it has a segmental-feather 9 fixed upon it.

A10 is a collar Yor head turnable in channels cut in the head 8 and. having a keyway passing through it, which fits` the segmental featherl 9, so that thedrill may be turned by Specification of Letters Patent. l Application tiled September 22, 1905. Serial No 279.602.

i Patented July '717, 1906.

l theusual ratchet or equivalent mechanism,

which will turn the shank or rod 7 and by at the same time allowing the shank to be re- .means ofthe vfeather 9 will turn the head'lO,

ciprocated through the head without advancing said head by reason ofthe impulses given by the pressure' upon the piston Withinthe cylinder, which is oithe ,usual character. Around the head 10 'is a larger portion 11,

having a groove made init, as at"12. Upon each side of this enlarged portion 11 are packing-rings 13, wnicn, fitting in a. groove or channel -in which this portion of the head 10 turns,I make. a tight joint around the head,

while allowing the drill-chuck to be reci rocated-and turned, as previously descri ed'. A similar packing-ring 7( may be employed to make a tight joint around the shank 7.

The end of the tube 3.fits and corresponds with a groove or channel 14, which is made in the corresponding side of the chuck or clamp 5, and a tube 15 extends from the collarl or head 10 into this groove or channel, the tube being stationary With the collar. The chuck 5 will slide upon the tube in unison with the reciprocations of the drill. The inner end of this tube enters or connects with a passage within the collar 10, and this passage is connected by a radial hole 16 with the groovei'i85 the end of thedrill., and it will be seenthat by reason of the annular channel 12 the collar or head 10 may be constantl rotated in unison with the rotation of the rill, and an open passage will always be maintained through this annular channel and through a pipe or passage 17, which opens into the head 8*, within which the collar. is contained. In order to supply water through these passa es, I have 'shown a chamber 18. One side o this chamber has fa hose extending` from it tofi'the,

The chamber has screen-openingsmade in one end, as shown at 20, anda'val ve4` 21 adapted to seat over these openings when under pressure, The valve is normallyheld open by a spring 22, and when thus opened the chamber being submerged in water' will be iilled With the Waterthroug-h these openings. The Valve-has a sleeve 23, which fits -and is slidable upon a tube 24, and this tube extends into the head oppositetothe vvalve and is in connection with a hosel25,.connect ing with this end lof the chamber. .flhishose IOO similar holes are made through the sleeve 23 yIO connects with the source` of air-supply ano 4has a controlling-cock,I as at 26. The inner tube 24 has holes made in it, and

and these holes register when the valve is closed. The valve-stem i'its and is s lidable upon a feather fixed 4in a `tubular extension from the perforated or foramnous head, and thus maintains the re ister of the small holes 27,-previously referre to.' i

The operation will then bef as follows: valve'is normally held lopen by la spring' 22, 'so that watermayenter thesubmcrged casing and fill it, the air-pressure through'the ysupply-hosebeing cut off by closing the cock 26. When it is desired to introduce water 'into the drill-hole, air is admitted through the supply-hose and enterin through the passages heretofore describe will by its pressure close the valve and prevent any escape of Water throu l the foraniinous inlet. `The small :holes in t e interior air-pipe and the sleeve of thevalve-stem 4being then in register, air Will escape through these holes'and will force the water-from the cha mber through-the hose 17,

y and thus through the connections heretofore describedwater .will be 'admitted into the 'drill-hole.

"controlling the air-pressurel within fthe chamber containing 'the water, and it maybe 'fcut off -at any time. V When thus cut off, the' 'valve-2l will ag. 'in open and allow the chamber to refill, thus the chamber being sub- `merged will be constantlysupplied with waterwhcnever the air-pressure thereto is cut oil', `andby opening the cock controlling the air-sup ly the water will be forced into the drill-lio e. i l

` -Having thus described my invention, what I Qlaim, and desire to secure by Letters Pat- 1. Ina rock-drill, means for supplying water to the drill-hole, said-'means consisting of a pipe, 'a drill-shank hf ving a channel within which the pipe is htte a so'cketmember at the head .of the shan-1, a'chuckinto which the drill-shank and :socket member are iii- 'serted, a pipe lupon which the chuck is slidfcon'ductingipe oftheshank connects',-`a

head embracing the shank of the chuck anda collar turnably' mounted in said head, a pipe extending4 fromf-the collar into the water-l channel ofl'the"chuck,-upon which .pipe the chuck is slidable, and means-.for supplying Waterthrough the collarlto said pipe.

'chuck at one end thereof passing through said collarhafeather upon en-'tial groove, v The *supply of water is controlled hole. l Y f 6. 'In a rock-drill, lthe combination of a A3. In av rock-drill the combination oi a channeled -drill-s'htnknfa drill-chuc'k,- a head or easin f having an enlarged circular'chamber, acol ariitting and turnable insa-id chamber and having" a channel or groove around its central portion, a water-conducting pipe extending from the .collar into thedrill-chuck and having open communication with thechannel of the collar,-'a pipe located in one side of the drill-shank and extending. to near the chuck end, said ipe connecting with the interior ci v the chuck) in line with the water,- conducting iipe, said chuck bein reciprocable with relation to the collar an vits casing.

:'42 In a rock-drill, the combination'ofI a head or casing having an'ienlarg,ed circular chamber within it, a collarjitting and turnable Within said chambena 'dill-slhankfano a havinga. vshank the shank slidable in a corresponding'slot or channel in the collar whereby 'the two are' turnable in unisonwith the turning-'of- .the drill, said collar having, also,a circumferential groovfe or channel, y,means .for :supp-lying water through the casing into said c ircurner-f a ipe xed to the collar `and extendmginto t e drill-chuck, upon which pipe the chuck'. and drill are reci rocab'le, y connections between the groove ,oft e collar and the ,interior-of said ipe, and a pipe emvbeddednpu the drill-shan extending to near f the cutting end,

said last-named pipe be in open communication with the conducti passage ofthe chuck. 5. n a rock-drill, the combination of head 'or casingl having any enlarged circular chamber within it, a collar turnable in said chamber, a chuck having a shank passing through the center of the collar and the casing, ,said chuck having an openin a feather upon the shank slidab e therewith throu h theicollar whereby said collar is turna le in-unisonwith the shank, packingrin s making a Water-tight joint around the lar havin a circumpac 4 -rings, rough col ar and shank', said co ferential groove between t and said casinghavingfa. .assage t which water is supplied to said groove, fixed inthe chuck having a groove' orpassage in one side, a water-conductin pipe embedded in the said groove of the'v rill, and connectin(r with the interior of the ,chuck at one in one side vio5 a drill y,

side o? the.`drillshank, a pipe fixed tothe@ collar in line with said opening'in thechuck, and upon which the chuck is slidable whereby water may be introduced throu h the connecting-passages to the bottom o fixed casing, a shank s lidable therethrough and having la feather ix'el to it, said casin having an enlarged circular chamber, aflange head turnably mounted' in saidy chamber,

means for making ltight joints around the the drill- ISO vsaid chuck havingr a tubul side fitting and slidable on said pipe, a pipe shank and flanged portion of the head, a chuck and a drill secured therein carried b the shank, a pipe projecting from the hear ar channel in one embedded in the shank ofthe dri ing near the cutting-bits, and connectin with said pipe projecting from the head, sai

head having its flangedA portion provided l and openwith a groove or channel which connects with said projecting pipe, a water-conductinv pipe connecting with said groove or channel, and means for intermittently supplying water thereto.

I'is

7. A11 apparatus for supplying water in the the holes o rock-drills, said apparatus comprising a drill-shank, a chuck therefor pipe embedded in the driushank and discharging near the cutting-bits, a collar revoluble 1nl ar slidable pipe connections be# ed casing,

tween said collar and the drill-chuck and tube in the drill-shank, said collar having a groove in its peripheryvconnecting with the conductnesses u JAMES MATHERS.

Witnesses:

S. H. N oUnsn, M. G. REDDY.

drill-hole un- 

